用于为谐波抑制混频器提供六个本振信号的分频器

Donghai Chen, Zhigong Wang, Junliang Wang, Jian Xu, Yiqiang Wu
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引用次数: 0

摘要

本文通过分析输入LO信号发送到谐波抑制混频器(HRM)的需求,设计了用于HRM的分频器,该分频器用于提供6个相移45°的LO正交信号,以抵消3阶和5阶谐波。分频器由两个主从锁存器构成4个D触发器,最高工作频率与最大延迟路径成反比。它可以在800MHz-1.6GHz的宽范围内工作。这种分频器可以提供稳定性更好的输出信号,提高匹配特性,使相位误差小于1°。由于相位误差小,抑制谐波3和5优于-50dBc。该分压器在1.8 v电源电压下可输出1.2 mA电流,采用0.18 μm CMOS工艺制造,布局面积为0.0273mm2。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A divider used to provide six local oscillator signals for harmonic rejection mixer
In this paper, by analysing the requirement of input LO signals sending to a harmonic rejection mixer (HRM), a divider is designed for HRM, which is used to supply six LO quadrature signals with a phase shift of 45° to cancel the 3th and 5th order harmonics. The divider consists of four D flip-flops which is constructed by two master-slave latches, and the highest operating frequency is inversely proportional to the maximum delay path. And it can operate well over a wide range of 800MHz-1.6GHz. This kind of divider can provide output signals with better stability and improve the match characteristic so that the phase error is less than 1°. Because of the small phase error, harmonic rejection 3th and 5th are better than -50dBc. The divider draws a current of 1.2 mA under 1.8-V supply voltage, fabricated in a 0.18-μm CMOS process with a layout area of 0.0273mm2.
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